PREDICTION OF FLEXIBLE PAVEMENT PERFORMANCE FROM DEFLECTION MEASUREMENTS

AN ATTEMPT WAS MADE TO DEVELOP CORRELATION EQUATIONS WHEREBY A FLEXIBLE PAVEMENT COULD BE TESTED AT A GIVEN POINT IN TIME AND ITS FUTURE PERFORMANCE OR CAPABILITY PREDICTED. ENCOURAGING RESULTS WERE OBTAINED IN WHICH DEFLECTION UNDER MOVING LOAD WAS USED AS THE PREDITOR OF PAVEMENT PERFORMANCE. THE DEFLECTIONS USED IN THE ROAD TEST ANALYSIS WERE MEASURED WITH THE BENKELMAN BEAM WITH THE OUTSIDE WHEELS OF THE TEST VEHICLE POSITIONED ABOUT 3 FEET FROM THE PAVEMENT EDGE. AVERAGE VALUES FROM TESTS IN BOTH WHEEL PATHS WERE USED. BASIC PREMISE WAS THAT THE DEFLECTION OF A GIVEN PAVEMENT UNDER A PARTICULAR LOAD WOULD SERVE AS A BETTER MEASURE OF THE PAVEMENTS ABILITY TO WITHSTAND MANY APPLICATIONS OF THAT LOAD THAN KNOWLEDGE OF THE PAVEMENT. STRUCTURAL DESIGN ALONE. A MATHEMATICAL MODEL WAS FOUND FROM WHICH THE LIFE OF A PAVEMENT TO A GIVEN LEVEL OF SERVICEABILITY COULD BE ESTIMATED SATISFACTORY PROVIDING LOAD AND DEFLECTION WERE INCLUDED IN THE FUNCTION. IT WAS DEMONSTRATED AT THE AASHO ROAD TEST THAT PERFORMANCE IN TERMS OF APPLICATIONS TO A GIVEN SERVICEABILITY LEVEL MAY BE PREDICTED WITH SATISFACTORY PRECISION FROM MEASUREMENTS OF DEFLECTION MADE IN THE FALL ON NEWLY COMPLETED PAVEMENTS OR DURING THE CRITICAL SPRING PERIOD PROVIDED THAT THE MONIMAL AXLE LOAD IS KNOWN.

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/sr/sr73/73-015.pdf
• Supplemental Notes:
  • pp 224-226, 3 FIG, 1 TAB Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
• Corporate Authors:

  Highway Research Board

  2101 Constitution Avenue, NW
  Washington, DC    20418

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Authors:
  • Benkelman, A C
  • Carey Jr, W N
• Conference:
  • Highway Research Board Conference on the AASHO Road Test
  • Location: St Louis MO, United States
  • Date: 1962-5-16 to 1962-5-18
• Publication Date: 1962

Media Info

• Monograph Title: THE AASHO ROAD TEST - PROCEEDINGS OF A CONFERENCE HELD MAY 16-18, 1962, ST. LOUIS, MISSOURI
• Serial:
  • Highway Research Board Special Report
  • Issue Number: 73
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Axle load force; Benkelman beam; Deflection; Flexible pavements; Mathematical models; Motion; Motor vehicles; Pavement performance; Pavements; Serviceability
• Identifier Terms: AASHO Road Test
• Uncontrolled Terms: Moving vehicles; Serviceability Index
• Old TRIS Terms: Pavement deflection
• Subject Areas: Design; Highways; Pavements;

Filing Info

• Accession Number: 00207119
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Aug 26 1970 12:00AM